package cgeo.geocaching.location;

import static org.assertj.core.api.Assertions.assertThat;

import cgeo.CGeoTestCase;
import cgeo.geocaching.CgeoApplication;
import cgeo.geocaching.utils.Log;

import org.apache.commons.lang3.StringUtils;
import org.assertj.core.data.Offset;

import rx.Observable;

import android.location.Address;
import android.location.Geocoder;

import java.util.Locale;

public class GeocoderTest extends CGeoTestCase {

    private static final String TEST_ADDRESS = "46 rue Barrault, Paris, France";
    private static final double TEST_LATITUDE = 48.82677;
    private static final double TEST_LONGITUDE = 2.34644;
    private static final Geopoint TEST_COORDS = new Geopoint(TEST_LATITUDE, TEST_LONGITUDE);
    private static final Offset<Double> TEST_OFFSET = Offset.offset(0.00050);

    public static void testAndroidGeocoder() {
        final Locale locale = Locale.getDefault();
        try {
            Locale.setDefault(Locale.US);
            // Some emulators don't have access to Google Android geocoder
            if (Geocoder.isPresent()) {
                final AndroidGeocoder geocoder = new AndroidGeocoder(CgeoApplication.getInstance());
                testGeocoder(geocoder.getFromLocationName(TEST_ADDRESS), "Android", true);
                testGeocoder(geocoder.getFromLocation(TEST_COORDS), "Android reverse", true);
            } else {
                Log.i("not testing absent Android geocoder");
            }
        } finally {
            Locale.setDefault(locale);
        }
    }

    public static void testGCGeocoder() {
        testGeocoder(GCGeocoder.getFromLocationName(TEST_ADDRESS), "GC", false);
    }

    public static void testMapQuestGeocoder() {
        final Locale locale = Locale.getDefault();
        try {
            Locale.setDefault(Locale.US);
            testGeocoder(MapQuestGeocoder.getFromLocationName(TEST_ADDRESS), "MapQuest", true);
            testGeocoder(MapQuestGeocoder.getFromLocation(TEST_COORDS), "MapQuest reverse", true);
        } finally {
            Locale.setDefault(locale);
        }
    }

    public static void testGeocoder(final Observable<Address> addressObservable, final String geocoder, final boolean withAddress) {
        final Address address = addressObservable.toBlocking().first();
        assertThat(address.getLatitude()).as(describe("latitude", geocoder)).isCloseTo(TEST_LATITUDE, TEST_OFFSET);
        assertThat(address.getLongitude()).as(describe("longitude", geocoder)).isCloseTo(TEST_LONGITUDE, TEST_OFFSET);
        if (withAddress) {
            assertThat(StringUtils.lowerCase(address.getAddressLine(0))).as(describe("street address", geocoder)).contains("barrault");
            assertThat(address.getLocality()).as(describe("locality", geocoder)).isEqualTo("Paris");
            assertThat(address.getCountryCode()).as(describe("country code", geocoder)).isEqualTo("FR");
            // don't assert on country name, as this can be localized, e.g. with the mapquest geocoder
        }
    }

    private static String describe(final String field, final String geocoder) {
        return new StringBuilder(field).append(" for ").append(geocoder).append(" .geocoder").toString();
    }

}
